A dog belonging to Millar was so well trained, that he had only to show him during the day the parcel of sheep which he desired to have; and when dismissed at night for the purpose, Yarrow went right to the pasture where the flock had fed, and carried off the quantity shown him.

He then drove them before him by the most secret paths to Murdison's farm, where the dishonest master and servant were in readiness to receive the booty.

Two things were remarkable.

In the first place, that if the dog, when thus dishonestly employed, actually met his master, he observed great caution in recognising him, as if he had been afraid of bringing him under suspicion; secondly, that he showed a distinct sense that the illegal transactions in which he was engaged were not of a nature to endure daylight.

The sheep which he was directed to drive, were often reluctant to leave their own pastures, and sometimes the intervention of rivers or other obstacles made their progress peculiarly difficult.